On Wednesday, 26 July 2000, John Henckel writes:

> To the lilypond developers,
> 
> When you get a chance, I would appreciate if you can add a feature for me.
> 
> I am typesetting some hymns, and the prevailing convention in hymnals is to 
> have BOTH a slur on top and a slur on the bottom.  So I would like to see a 
> \slurupdown option to enable this.
> 
> The attached jpeg shows a picture of what I want, which I produced with 
> *considerable* effort by overlaying two voices with the same notes (one 
> with \slurup and one \slurdown)

It's not actually really what you wanted/requested, but with LilyPond .79
you'll be able to do:

    %% almost.ly
    \score{
            \context Staff <
                    \time 4/4;
                    \context Voice=one \partcombine Voice
                            \context Thread=one \notes\relative c'' {
                                    a4 c4.()g8 a4 |
                                    g4 e' g()f | 
                                    b, a c2
                            }
                            \context Thread=two \notes\relative c'' {
                                    g4 e4.d8 c4 |
                                    g'4 c, e f |
                                    d2 a
                            }
            >
            \paper{
                    linewidth=140.\mm;
                    \translator {
                            \VoiceContext
                            soloADue = ##f
                    }
            }
    }

[Apart from the slurs, this looks identical to your slurs.jpeg]

Double slurs will probably not be an option for some time to come,
but the part combiner will set the stem directions are set automagically.

Greetings,

Jan.

-- 
Jan Nieuwenhuizen <[EMAIL PROTECTED]> | GNU LilyPond - The music typesetter
http://www.xs4all.nl/~jantien       | http://www.lilypond.org

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